Community hub
Recent from talks
Knowledge base stats:
Talk channels stats:
Members stats:
UHF CB
UHF CB is a class-licensed citizen's band radio service authorised by the governments of Australia, Europe, Malaysia, New Zealand, Singapore[citation needed], Vanuatu, and in the PMR446, UHF 477 MHz band.[clarification needed] UHF CB provides 77 channels, including 32 channels (16 output, 16 input) allocated to repeater stations. It is similar in concept to the General Mobile Radio Service in the United States.
User equipment designs are similar to commercial land mobile two-way radio, except the maximum legal output power is 5 Watts.[clarification needed] External antennas are permitted and commercially manufactured antennas have gains as high as 12 dB. Handheld transceivers (handy talkies) are permitted and have transmit power from 500 mW to 5 W (full legal power) and are relatively cheap compared to full-sized transceivers. Operation in the band is restricted to modes F3E and G3E (FM or PM of analogue voice telephony) except for channels 22 and 23, which are data modes only.
In Australia, class licensing means that users do not have to apply for a licence or pay a licence fee; however, they must comply with the regulations of the class licence.
It is illegal to use non-standard radios purchased from outside Australia because they may interfere with licensed land-mobile services. This includes overseas personal radio service devices because they do not share the same band plan, power output and channels as UHF CB. Care must be taken when importing radios from overseas to ensure they comply with local regulations. Approved radios are identified by the Regulatory Compliance Mark (RCM) label, usually found on the rear panel of the equipment.
Many UHF CB radios allow the user to scan channels to find a conversation. Several different scan modes may be provided:
Open Scan scans all 80 channels to find an active conversation. Some radios allow skipping selected channels when scanning.
Group Scan scans a small number of selected channels. For example, a caravanner travelling around the country may choose to group scan Channel 40 (Road Channel), 18 (Caravan Channel) and 5 (Emergency Channel) so they will hear any conversations relating to their travels.
Priority Scan allows selection of a "priority" channel whilst scanning a handful of selected channels. This could be useful, for example, in a convoy of vehicles: convoy members can set their chosen convoy channel as a "priority" whilst scanning the designated road channel for traffic updates etc. If a convoy member speaks, the radio will switch back to the priority channel even if someone is speaking on another channel.
Hub AI
UHF CB AI simulator
(@UHF CB_simulator)
UHF CB
UHF CB is a class-licensed citizen's band radio service authorised by the governments of Australia, Europe, Malaysia, New Zealand, Singapore[citation needed], Vanuatu, and in the PMR446, UHF 477 MHz band.[clarification needed] UHF CB provides 77 channels, including 32 channels (16 output, 16 input) allocated to repeater stations. It is similar in concept to the General Mobile Radio Service in the United States.
User equipment designs are similar to commercial land mobile two-way radio, except the maximum legal output power is 5 Watts.[clarification needed] External antennas are permitted and commercially manufactured antennas have gains as high as 12 dB. Handheld transceivers (handy talkies) are permitted and have transmit power from 500 mW to 5 W (full legal power) and are relatively cheap compared to full-sized transceivers. Operation in the band is restricted to modes F3E and G3E (FM or PM of analogue voice telephony) except for channels 22 and 23, which are data modes only.
In Australia, class licensing means that users do not have to apply for a licence or pay a licence fee; however, they must comply with the regulations of the class licence.
It is illegal to use non-standard radios purchased from outside Australia because they may interfere with licensed land-mobile services. This includes overseas personal radio service devices because they do not share the same band plan, power output and channels as UHF CB. Care must be taken when importing radios from overseas to ensure they comply with local regulations. Approved radios are identified by the Regulatory Compliance Mark (RCM) label, usually found on the rear panel of the equipment.
Many UHF CB radios allow the user to scan channels to find a conversation. Several different scan modes may be provided:
Open Scan scans all 80 channels to find an active conversation. Some radios allow skipping selected channels when scanning.
Group Scan scans a small number of selected channels. For example, a caravanner travelling around the country may choose to group scan Channel 40 (Road Channel), 18 (Caravan Channel) and 5 (Emergency Channel) so they will hear any conversations relating to their travels.
Priority Scan allows selection of a "priority" channel whilst scanning a handful of selected channels. This could be useful, for example, in a convoy of vehicles: convoy members can set their chosen convoy channel as a "priority" whilst scanning the designated road channel for traffic updates etc. If a convoy member speaks, the radio will switch back to the priority channel even if someone is speaking on another channel.